Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Goodwill [Roll Forward]
Balance at beginning of period	$ 1,185	$ 1,186
Foreign currency translation	(17)	1
Balance at end of period	1,168	1,187
North America Segment [Member]
Goodwill [Roll Forward]
Balance at beginning of period	1,105	1,105
Foreign currency translation	(1)	0
Balance at end of period	1,104	1,105
International Segment [Member]
Goodwill [Roll Forward]
Balance at beginning of period	80	81
Foreign currency translation	(16)	1
Balance at end of period	$ 64	$ 82